Improved bolt-outtee



@nitro gitane stmt @fre- JACOB' STRYER AND THOMAS HAZELHURST, 0F SOUTH BEND, INDIANA. Tlettera Patent 1Y0. 66,107, dated June 25, 1867.

IMPROVIID BOLT-GUTTER.

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` TO ALL WHGM. IT MAY OONCERN:

Be it known that we, JACOB STRAYER and THOMAS HAznLuURs'r, of South Bend, in tho county of St. Joseph, and State of Indiana, baveinventecl :1- new and useful Improvement iut'Bolt or Screw-Cutters; and we do herebyideclare that the following vis a full and exact description thereof, reference being had to the accompanying drawings, and to the letters oi' reference marked thereon. I

Our invention consists in n. peculiar arrangement and construction of bolts with bevclled ends, or ends.

turned to a point, and the use of' this bevel for pushing forward the dies or cutters in a chuck forcutting screwthreads and bolts. In the accompanying drawings- Figure 1 is a sideview of our serewcutter or bolt-cutter.

Figure 2 is a transverse section showingthc dies or cutters and the springs for operatingr the same, the front portion ofthe face plate of the. chuck being cut away.

In the construction of our improved screw or bolt-cutter a shaft, A, iig, 1, is'provided with a chuck or face plate, B, in which are arranged three or more dies or-,cutters C, with suitable edges for cutting screw-threads.

For the purpose ofarljusting. these dies or cutters we employ an adjusting plate. D, having a neck, D. and sliding upon the shaft A. This plate D carries three or more s hort bolts E, very firmly fixed in the plate D by means of shoulders e and nuts F near one end of the bolts. l These bolts are nicely fitted to holes I in cutters C'. The points of the bolts are bevelled, as seein at L, fig. 3, so as to act like wedges upon the: cutters when such .points are entering the hole I, the cutters being pushed back by the springs so that only the point of the bolt can enter such hole until the cutter is pushed forward;`

The operation is as follows: When the adjusting plate AI) is pushed back,'or to the right, and the dies or cutters are also pushed out by the springs G,\the bevel of the points of the bolts rests against one side of the holes in the cutters. Now, as the platevD and the bolts E are pushed forward, -or to the left, the point or bevel on thepoi'nts of theV bolts pushes all three of the cutters or dies forward toward the centre of the chuck. Thus the cutting of the screw-thread muy be regulated at pleasure. VThe chuck may have spring H, and in other respects be constructed and operated in the usual manner.

Having thus fully described our invention, what we claim, and desire to secure by Letters lPatent of the United States, isn A1. The bolts E, in'combination with the cutters C and springs G,.arranged and operated substantially as above described. 4 l

2. We also claim the combina-tion of thc'springs G, cutters C, chuck B,Jand bolt@ E, substantially in the manner and for the purposes set forth. Y i

' JACOB STRAYER., THOMAS' HAZELHURST. Witnesses D. GREENAWALT, JOHN SHEDDRIciz. 

